Specifically the top mounted rad. As you guys can see, I used the little rubble dampeners to create a level surface for the fans to make it a little more air tight. I pulled out the corner of the closest fan to show that I cut the rubber there as it would have to go over top of the crossbeam, creating a bump and making it less flat for the fan mount.

Bottom view, only pic I have showing the clearance about the RAM/CPU socket. It's impossible to mount fans in push/pull in the HAF X with a 62mm thick rad like the TFC Xchanger 360, HWLabs 360 GTX, etc.